Automatically working continuous gearing device



May 24, 1932. J. E. THELLMOD ET AL 5 AUTOMATICALLY WORKING CONTINUOUS GEAR ING DEVICE Filed March 21, 1930 4 Sheets-Sheet l .Tnvenlonsyy 1932. J. E. THELLMOD ET AL 1,859,899

AUTOMATICALLY WORKING CONTINUOUS GEARING DEVICE Filed Ma'rch 21, 1950 4 Sheets-Sheet 2 May 24, 1932.

AUTOMATICALLY WORKING CONTINUOUS GEARING DEVICE Filed March 21, 1936 J. E. THELLMCD ET AL QSheetS-Sheet 3 ZzwenZar-w- 9 9 5 w I v E D G N I m Aw m Mm om Mm G C Tm rR Em M L A C T. T A M 0 T U A May 24, 1932.

'Filed March 21, 1930 4 ShQets-Sheet 4 Ill II A DA III III Patented May 24 1932 mm,ewe

JOHAN EMIL :diHELLMoD A D BIRGER ZETTERQREN, vor s'ro'okHo M, 'As- 7 SIGNOBS T HELGE GUS'I'AF roimm";onsrooKHoL swenEn f a.

AUTOMATICALLY WORKING eoivrmtroesj e'EAigmep yIcn '1' hpplicationfiled- March 21, 1930, Serial No.. 43 ?,696,- and in sweden Ju e 4,1929, L-: 1:

This in ention relates to autoni atieally Working. gearing devices-especially those with friction clutch coupling; y The object of the invention is to obtam such arrangement of thegearing'devlcey that thefnormalpressure between the friction members is capable of being regulated Joy means ozftwocooperating surfaces, which cause a squeezing to one of the Sld6S f0l instance a Wedge stone eccentriqlever, sore-W or similar. member, by which the power is .transmittedand influences thej no rmal pres sure, so that thisbeoomes automatically variable according to the; moment of torsion of the 'rnotor power-er the load.

An embodiment," shownfas my example, of

' theinyention is illustrated in the accompanyin-g' drawings; Where Fig. :1 shows a section on the-line 1 1 of'Fig; fithrough the h'ori-' zont'al :planeof; the gearoase. Fig. 2 isaseetien onlthe line -2-'-2' OfFig. 1- through the rotor for; the planet gearing,1 showing the brake. devise. Fig. 3 shows,.on a larger seale,

mal pressure the rr-coupling and appertaining parts of Fig. Fig/i shows; on a l'arger scale,'th e normal pressure members; "Fig; 5 shows a partially sectioned sidefview; Fig. 6 shows across'seotion of the; friction-rolls and the centrifugal governors. Fig, '7' is a seetion on the iihe a -a, of Fig. 1 showing the Wedge 61 on a larger scale. l

V; The Jmotor shaft l is j oilr alled in the outer siirroiinding oase Qhy means ofgthe hearing 3 and the journal 4 (-slidinghearing).

Anormal pressure member fi (seelFigg) is rigidly connected to the shaft 1 The end surface 6Hof the pressure member, Which-aecording to the embodiment, isformed as a' wedge plane- Z, presses against the-eon responding wedge plane-8 of;the axially movable sleeve 9 rotatingtogether With the shaft 1. A 3.

' The moment of torsion motor, Which is transmitted tothe edge where c: eqhals theii e dg gpisj sure-Nis ow transrhittedhy the sleev'e9 to the pressure member, 10, which is rigidly ,COIIDQOilGd to the sleeveyandxbythe journal 7 ll to t-he huh; 12, and furtherby the arms 13 to the friction disk lqrestingzagainst the i journal 17 ,on the lmotor shaft 1 against the floor-stand l8, which also (serves to support friotion rolls and- 16.1 The pressure oorlfes f spending to N; is taken up loy thepressure r ed wheelyvhioh transmits the moment. of tor- .sion to. toothed wheels 20 mm 21, said Wheels rigidly connected to driving shafts '22 and 23.. Wedges 24: and 25" arefixedin the I shafts 22 ?11163 23,1 Whioh edges IdriVeQ-the" a iaxiallyruovable friction or :drivingrolls 15 1.6,.Whioh transinitthe moment of torsion 'ofthelmotor to. the frietioi disk 14, the arms 1 r An intermediatesleeve i2 6 ooh} I nested to thelhu b 12;and throughthe latter .1ourrialleclin journals 27Cand28 The iiiter- 1 13 and the hub 12.

mediate sleeve 26 is by means. ofa multiple I diameteroit the disk, said diameter-slightly then pressed in a pressnre disk 3Lloy means or resistance of the r @ndm" The pressur 1 1 12 7 o heax a l ;.f s lii t i -el it li25 exceeding that of; the rolls. The rollshave 1y about thetoothedwheel 19,; presses through; V pressure j1oi1rna1l-56 agains'tla 7r'1Cll ltCl'l57" l underfinfluence of the initialsuspension v spriziggfiSQand connects in a knownyvaylthe' disk clutch 29 rigidlyconne cted-to a flange 30 2 lf j,

, wedged in the .olriving shaft 31. The flange 30 y and theshaft 31 are join-nailed inf'journals 32 and 3 the fjournal32-heing supported by,

zthe driving shaft 1. '7

vFig. 11 shows thet r= m-otor" Con-pl ed direct- 1 1y to the driven shaft 31, ire. the moment of torsion does notgo through the normalpres' sure memhers to; thew sleeve Qetcotera; ,At direet coupling,v Ithe r0lls'15- "and 16 lieon 'a which by means of a Wedge or several Wedges 7 60 is connected to the hub 12 The moment of torsion of the'motor now goes through a wedge 61 direct to the clutches 57, 59, the hub 12, the intermediate sleeve 26, the multiple disk clutch 29and'the flange 80 and trans 'mits the moment to the driven shaft 31. At

the'same time the pressure of the initial suspension spring 58 over the ournals 27 andll,

the pressure member and the sleeve 9, on

the one'hand, and over the clutch 57 ,the

pressure ournal56; and the pressure disk 34, on the other hand, against the oblique planes 35 and 36 aims-tounload the normal pres-.v sure between-the disk 14 and the rolls and Should'the number of the revolutions of the motor deoreaseunder the normal on account of a larger resistance on the driven shaft, the counter weights 37 of the centrifugal governor (see Figs. 5 and 6) will aim on account of the pressure of the governor springs 62, to press a sleeve 38 by-means of links 63, moving the friction disk 4010f the carrier 42, which is sp-lined to a shaft'41 against the friction disk 64 in the toothed wheel-43 freely rotating onthe shaft 41, said "toothed wheel getting its motion from the toothed wheel 44, which'is rigidly connected to the shaft 22. As the regulation shaft41 is right-handed at the upper side of the centrifugal governor, and left-handedthreaded atthe lower side, depending on the direction of mo- :tion' of. the motor, the shaft 41 aimsby the motion from the'toothed wheels 43 and '44,"to screw off the roll pressers 45 and 46 carrying the rolls 15 and 16. The '1r-clutch57 (see Fig; 3), which immediately strikes against the lip 66 on the hub 12, transmit- Fig. 1) is in consequence of this disengaged from the clutch'59 on'account of the disk 34 rolling off the rolls 15 and 16. The initial suspension spring 58 follows with the sleeve ting the initial pressure to the disk 14 against the rolls 15 and 16. i I

Shouldthe motor go on keeping the number of the revolutions underthe normal, the rollpressers 45 an d 46 will aim to screw off the rolls 15 and .16 to the position corresponding 7 to the resistance, possibly to theouter bound- 'ary position (the dot-and-dash-lined one),

j the largest gearing beingthen obtained. In order to prevent the disks40 and 64 from rubbing, against each other when the roll is at its outerposition', a rod 67 with the journal 68 is mounted in the shaft41. The presser 46 presses against the journal 68duringaxial movement of the rod 67,-andinfluences the c-arrier42 by means of the journal 69, so that free run is obtained.

" hen the resistance decreases, so that the 1 inumberof revolutions increases over the normal the centrifugal weights. strikel'out and press the friction disk47 of the carrier 42 by "means'o'ft'he links 63and the sleeve 38 againstthe friction disk 48 of the toothed wheel 49 order to prevent the disks 47 and 48 from rubbing against each other. when direct coupling has been obtained, theroll presser 46 moves'the rod67 by -means 0f the journals 69 and 7 O and the carrier 42 towards the sleeve 38, s'o that the disks 47 and 48' are disengaged from each other, and free run is obtained;

Inorder to get arregulat'able settingat differentv desired numbers of revolutions, a 1 pull and suspension spring53 is mounted in the upperpart of the shafti41, and this spring may be strained or relaxed by means of a nut-'55 in the mantle 56" with the help of an arm 54. "The straining of the spring'then' influences the carrier 42 by means of the rod 52 and the journal 51, and regulates the. Y

counter weights of the centrifugal governor. lVhen'goingastern (seed Figs. 1, 2and 3) one proceeds in'thefollowing manne r.-

At free coupling the lever'7-1 (Fig: 5) is moved upwards disengaging the coupling-72,

which is axially movable onthe shaft 31 .(see Fig. 1). The clutch springs 73 are strained and disengage the multiple; disk clutch 29,

the, toothed wheels '74 rolling then freely in'theplanet ring'75. When going astern the brake band strainer 76 (see Fig." 2)is pressed downwards (the'latter-may be connected to the lever 71 orto a foot pedal) and strains the brake band 77 sothat the rotor stops, the direction of motion being thenireversed by'the planet ring 75.

The multiple diskiclutch has been placed i behindthe ingoing shaft 1 for the purpose of taking up possible bumps or abnormal re sistances on the driven shaft As the normal pressure lncreases 1n proportlon to there- 'sistanoe when the powencomes from the driven shaft, it might be'thought, that the pressure will become so large, that the-sur '"Jfaces between the parts 14 and 15 might be crushed, but this is excluded with the multiple disk clutch serving as sliding member.

Moreover, the disk-14 ought to'be necessary swinging mass, and therefore the balance wheel of the motor drops out, or, in other Words, the balance wheel may be constructed as a friction disk, and therefore the total r Weight ought not to exceed that ofthe present gear case.

It is clear, that eventwofriction one on each side of the rolls 15 and16, may be used without-going beyond the scope of the invention. i 4 I Having now described our invention, what' 1,859,899 t a 1 J y 3 We claim as new and desire tosecureby Letters Patent is: p 1

1; A gearing device of thecharacter described comprising, a driving shalt, a variable gear connection, and. meansffor deter: mining and controlling. the operation of said variable gear, saidmeans including anormal pressure member associated with the driving shaft and responsive to variations inthe moment of torsion of the motor power or load, a centrifugal governor, means for balancing the Weight of the governor at a selected speed of rotation," means operable by the governor for varying the ratio of the gear in one direction when the selected speed of rotation; is exceeded and means operable by the gov ernor-for varying theratio of the gear in the otherdirection when the selected speed is not reached. 1 l

2. A gearing device of theicharacter described comprising, a driving shaft,-a variable gear connection and means for determining and controllingthe operation of said variablege'ar, said mean'sincluding an ini-' 'tial pressure device associated with the varistop the actuation of the screw automatically when the gear ratio has beenvaried to I extreme in either direction.

roll, means for communicatingthe axial pressure from the normal pressure member to the friction disk, and I'neans including a,

clutch for overcoming said axiali pressure and'for directly coupling the driving shaft and the V driven shaft, said means being brought into operation by-the axial motion of the frictionroll. v

In; itness whereof 1we have 'hereuntdf sig edour'names. .7 J OI-IAN EMIL THELLMOD.

BIRGERZETTERGREN,

able gear and a. normal pressure member as sociated with-the driving shaft and respon-.

sive to variations in theimoment of torsion- "ofthe; motor'power or load, a centrifugal gear in the other direction when'the selectgovernor, meansfor balancingtheweight of the governorat a selected speed of rotation, means operable by .the governor for varying the ratio of the gear in one direction when the selected speed of rotation isexceeded and means operable by the governor for varying the ratio of the gear vinrthe other direction when the selected speed is not reached.

3. A gearing device of the character described comprising, a drivingshaft, a variable gear connectiorn'and means for continuously regulating the ratio of the gearing,

said means including an initial pressure device associated with theivariable gear anda normal pressure member 'assoclated wlth' the driving shaft andresponsive to variations in the moment of'torsion of the motor 7 power or load, a centrifugal governor,m'eans for balancing the weight of the governor at a selected'speed of rotation, means operable by the governorfor varying the ratio of the gear in one direction when the selected speed of rotation is exceeded and means. operable by the governor for varying the ratioof the ed speed is not reached.

4. In a device of. thecharacter described, a variable gear, a centrifugal governor, means for balancing the weight of the gov ernor at a selected speed of rotation, a screw 7 for varying the ratio of the gear in one di.1 I

rection' when the selected speed of rotation is exceeded and in the other direction when the selected speed is, not reached, meansop- 7 erable by the governor for oausing the actu 'ation of the screw, and adevice adapted to 

